Bio Exam#2

Front 1

Quiz 6:

Two chromosomes in a nucleus that carry for the same traits in the same positions on the chromosome but specify different versions of some traits constitute a pair of:

Back 1

Homologous chromosomes.

Front 2

Quiz 6/7:

Which of the following statements regarding the function of mitosis is false?

Back 2

Mitosis allows organisms to generate genetic diversity.

Front 3

Quiz 6/7:

Looking into your microscope, you spot an unusual cell. Instead of the typical rounded cell shape, the cell has a very narrow middle separating the two bulging ends. It sort of looks like the# 8! Then you realize that this cell is:

Back 3

undergoing cytokinesis.

Front 4

Quiz 6/7:

During which stage of meiosis does synapsis and the formation of tetrads occur?

Back 4

Prophase I

Front 5

Quiz 6:

The creation of offspring carrying genetic information from a single parent is called:

Back 5

asexual reproduction.

Front 6

Quiz 6:

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called:

Back 6

cytokinesis.

Front 7

Quiz 6:

If the S phase were eliminated from the cell cycle, the daughter cells would:

Back 7

have half the genetic material found in the parent cell.

Front 8

Quiz 6:

Asexual reproduction requires ____ individual(s).

Back 8

A: one

Front 9

Quiz 6:

8. During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?

Back 9

A: metaphase.

Front 10

Quiz 6:

Which of the following statements regarding mitosis and meiosis is false?

Back 10

A: Mitosis produces daughter cells with half the number of chromosomes as the parent cell.

Front 11

Quiz 6:

The genetic material is duplicated during ____.

Back 11

the S phase.

Front 12

Quiz 6:

Which of the following statements regarding the differences between mitosis and meiosis is false?

Back 12

A: Crossing over is a phenomenon that creates genetic diversity during mitosis.

Front 13

Quiz 6:

Which of the following statements is false?

Back 13

A: Gametes are made by mitosis.

Front 14

Quiz 6:

Eukaryotic cells spend most of their cell cycle in which phase?

Back 14

A: interphase.

Front 15

Quiz 6:

Which of the following options correctly describes the behavior of a tetrad during anaphase I of meiosis?

Back 15

A: it splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell.

Front 16

quiz 6:

The following statements regarding the function of mitosis are true:

Back 16

a). Mitosis allows organisms to grow.

b). Mitosis allows organisms to reproduce asexually.

c). Mitosis allows organisms to repair tissues.

d). Mitosis allows organisms to regenerate lost parts.

Front 17

quiz 6:

Which of the following statements regarding sexual and asexual reproduction is true?

Back 17

Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.

Front 18

quiz 6:

The following statements are true:

Back 18

a). Heterozygotes for hypercholesterolemia have blood cholesterols about twice normal.

b). The four blood types result from various combinations of the three different ABO alleles.

c). ABO blood groups can provide evidence of paternity.

d). The impact of a single gene on more than one character is called pleiotropy.

Front 19

quiz 6:

If the S phase were eliminated from the cell cycle, the daughter cells would

Back 19

have half the genetic material found in the parent cell.

Front 21

quiz 6:

During which phase of mitosis does the nuclear envelope re-form & the nucleoli reappear?

Back 21

telophase.

Front 22

quiz 6:

The vast majority of people afflicted with recessive disorders are born to parents who were

Back 22

not affected at all by the disease.

Front 23

quiz 6:

At the start of mitotic anaphase ______.

Back 23

the centromeres of each chromosomes come apart.

Front 24

quiz 6:

Which of the following occurs during interphase?

Back 24

Cell growth and duplication of the chromosomes.

Front 25

quiz 6:

During which stage of meiosis does synapsis & the formation of tetrads occur?

Back 25

prophase I.

Front 26

quiz 6:

Which of the following statements regarding genotypes and phenotypes is false?

Back 26

An allele that is fully expressed is referred to as recessive.

Front 27

Quiz 7:

The phase of mitosis during which the nuclear envelope fragments and the nucleoli disappear is called

Back 27

Prophase

Front 28

quiz 7:

Which of the following statements regarding cross-breeding and hybridization is false?

Back 28

The hybrid offspring of a cross are the P1 generation.

Front 29

quiz 7:

1. During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?

Back 29

A: Metaphase

Front 30

quiz 7:

Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as ____.

Back 30

true-breeding.

Front 31

quiz 7:

Mendel conducted his most memorable experiments on ___.

Back 31

peas.

Front 32

quiz 7:

A monohybrid cross is ____.

Back 32

A: a breeding experiment in which the parental varieties differ in only one characteristic.

Front 33

quiz 7:

3. The phase of mitosis during which the nuclear envelope fragments and the nucleoli disappear is called ____.

Back 33

A: Prophase.

Front 34

quiz 8:

Which of the following statements is false?

Back 34

A: Incomplete dominance supports the blending hypothesis.

Front 35

quiz 8:

2. Dr. Smith’s parents have normal hearing. However, Dr. Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abnormal allele d. The normal allele at this locus, associated with normal hearing, is D. Dr. Smith’s parents could have which of the following genotypes?

Back 35

A: Dd and Dd.

Front 36

quiz 8:

The alleles of a gene are found at ____ chromosomes.

Back 36

A: the same locus on homologous.

Front 37

Quiz 8:

If A is dominant to a and B is dominant to b, what is the expected phenotypic ratio of the cross: AaBb x AaBb?

Back 37

A: 9:3:3:1

Front 38

quiz 8:

4. Imagine that beak color in a finch species is controlled by a single gene. You mate a finch homozygous for orange (pigmented) beak with a finch homozygous for ivory (unpigmented) beak and get numerous offspring, all of which have a pale, ivory-orange beak. This pattern of color expression is most likely to be an ____.

Back 38

A: incomplete dominance.

Front 39

quiz 8:

A person with AB blood illustrates the principle of

Back 39

codominance.

Front 40

quiz 8:

All the offspring of a cross between a red-flowered plant and a white-flowered plant have pink flowers. This means that the allele for red flowers is ________ to the allele for white flowers.

Back 40

incompletely dominant

Front 41

quiz 8:

A carrier of a genetic disorder who does not show symptoms is most likely to be ________ to transmit it to offspring

Back 41

heterozygous for the trait and able

Front 42

quiz 8:

5. The expression of both alleles for a trait in a heterozygous individual illustrates ____.

Back 42

A: codominance.

Front 43

quiz 8:

Imagine that we mate two black Labrador dogs with normal vision and find that three of the puppies are like the parents, but one puppy is chocolate with normal vision and another is black with PRA (progressive retinal atrophy, a serious disease of vision). We can conclude that ____.

Back 43

A: the alleles for color and vision segregate independently during gamete formation.

Front 44

quiz 8:

Most genetic disorders of humans are caused by ____.

Back 44

A: recessive alleles.

Front 45

quiz 8:

Mendel’s law of independent assortment states that ____.

Back 45

A: each pair of alleles segregates independently of the other pairs of alleles during gamete formation.

Front 46

quiz 9:

The sex chromosome complement of a normal human male is ___.

Back 46

A: XY.

Front 47

quiz 9:

2. As a result of the T2 phage’s reproductive cycle, ____. [Activity: Phage T2 Reproductive Cycle 10.1]

Back 47

A: the host cell’s DNA is destroyed.

Front 48

quiz 9:

3. (Question 01) This is an image of a ____. [Activity: The Hershey-Chase Experiment 10.1]

Back 48

A: phage. This is a T2 phage, a type of phage that infects E. coli.

Front 49

quiz 9:

One type of virus that infects bacteria is called a ____.

Back 49

A: phage.

Front 50

quiz 9:

5. Which of the following statements regarding DNA is false?

Back 50

A: DNA uses the nitrogenous base uracil.

Front 51

quiz 9:

DNA replication ____.

Back 51

A: uses each strand of a DNA molecule as a template for the creation of a new strand.

Front 52

quiz 9:

Which of the following enzymes catalyzes the elongation of a new DNA strand?

Back 52

A: DNA polymerase

Front 53

quiz 9:

8. Which of the following people conducted the experiments that demonstrated that DNA is the genetic material of bacteriophages?

Back 53

A: Hershey & Chase

Front 54

quiz 9:

The following statements are true:

Back 54

a). DNA uses the sugar deoxyribose.

b). DNA is a nucleic acid.

c). One DNA molecule can include four different nucleotides in its structure.

d). DNA molecules have a sugar-phosphate backbone.

Front 55

quiz 9:

Scientists have discovered how to put together a bacteriophage with the protein coat of phage T2 and the DNA of phage T4. If this composite phage were allowed to infect a bacterium, the phages
produced in the host cell would have ____.

Back 55

A: the protein and DNA of T4.

Front 56

quiz 9:

Who demonstrated the DNA is the genetic material of the T2
phage?

Back 56

A: Hershey & Chase

Front 57

quiz 9:

The reproductive cycle of the T2 phage ends with the ____.

Back 57

A: rupture of the bacterium.

Front 58

quiz 9:

Which of the following statements regarding RNA is false?

Back 58

A: RNA uses the sugar dextrose.

Front 59

quiz 9:

A color-blind woman marries a man who is not color-blind. All of their sons, but none of their daughters, are color-blind. Which of the following statements correctly explains these results?

Back 59

The gene for color vision is linked to the X chromosome.

Front 60

quiz 9:

Hershey and Chase were able to differentiate between proteins and nucleic acids using radioactive atoms of elements found only in those macromolecules. Which of the following would be found only in proteins? ( Module 10.1)

Back 60

sulfur

Front 61

quiz 9:

Which of the following statements regarding a DNA double helix is always true?

Back 61

The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.

Front 62

quiz 9:

The radioactive isotope 32P labels the T2 phage's _____. Activity: The Hershey-Chase Experiment (10.1)

Back 62

DNA

The T2 phage consists of a protein coat and DNA. It is the DNA that contains P.

Front 63

quiz 9:

Which of the following is found in RNA but not in DNA? ( Module 10.2)

Back 63

an additional hydroxyl group

Correct. RNA's sugar, ribose, has an additional OH group in the 2′ position (lower right on Figure 10.2C). This OH group is missing in deoxyribose.

Front 64

quiz 9:

The information carried by a DNA molecule is in _____. ( Module 10.7)

Back 64

the order of the nucleotides in the molecule.

A DNA nucleotide can contain one of four bases.

General Feedback: Please consider the following recommendations for help with this content:
- Try BioFlix: Protein Synthesis.
- Listen to MP3 Tutor: DNA to RNA to Protein (10.6).

Front 65

quiz 9:

Which of the following describes a complete nucleotide? ( Module 10.2)

Back 65

a nitrogenous base, a sugar, and a phosphate group.

Each nucleotide unit of DNA consists of a nitrogenous base (A, G, C, or T), the sugar deoxyribose, and a phosphate group.

Front 66

quiz 9:

The shape of a DNA molecule is most like

Back 66

a twisted rope ladder.

Front 67

quiz 9:

During replication, the original "parent" DNA _____. ( Module 10.4)

Back 67

serves as the template for the creation of two complete sets of DNA.

As replication occurs, each side of the double helix acts as a template. Thus, each new DNA molecule includes one parent strand and one new strand.

Front 68

quiz 9:
-may be duplicate-
Hershey and Chase were able to differentiate between proteins and nucleic acids using radioactive atoms of elements found only in those macromolecules. Which of the following would be found only in proteins? ( Module 10.1)

Back 68

sulfur.

Proteins contain sulfur, but nucleic acids do not.

Front 69

quiz 9:

Sex-linked conditions are more common in men than in women because

Back 69

men need to inherit only one copy of the recessive allele for the condition to be fully expressed.

Front 70

quiz 9:

During replication, the original "parent" DNA _____. ( Module 10.4)

Back 70

serves as the template for the creation of two complete sets of DNA.

As replication occurs, each side of the double helix acts as a template. Thus, each new DNA molecule includes one parent strand and one new strand.

Front 71

quiz 9:

After allowing phages to grow with bacteria in a medium that contained 32P and 35S, Hershey and Chase used a centrifuge to separate the phage ghosts from the infected cell. They then examined the infected cells and found that they contained _____, which demonstrated that _____ is the phage's genetic material. Activity: The Hershey-Chase Experiment (10.1)

Back 71

E. labeled DNA ... DNA 100% Since the phage DNA entered the infected cell, it makes sense that DNA is the genetic material.

Front 72

quiz 9:

The way that genetic material of a bacteriophage enters a bacterium is most like the way that

Back 72

a drug is injected with a hypodermic needle.

Front 73

quiz 9:

If one strand of DNA is CGGTAC, the corresponding strand would be

Back 73

GCCATG.

Front 74

quiz 9:

The individual features of all organisms are the result of

Back 74

genetics and the environment.